The eye contains over two million working parts and is considered the second most complex organ in the body— the most complex is the brain.

Neutral Colored Glass Filters are named based on the average transmissivity characteristics in 400nm to 700nm wavelength with 2mm thick For example ZAB70 means 70%.

The nerves of the retina collect all of the electrical impulses, which then travel through the optic nerve at the very back of the eye up to the occipital lobe in the back of the brain.

The light passes through the pupil to the lens behind it. The lens adjusts its shape to bend and focus the light a second time, to ensure that you have a clear image of what you are looking at.

by KE Peiponen · 2006 · Cited by 11 — The dispersion theory for reflectivity of s- and p-polarized light is considered. The problem of phase retrieval from reflectance of p-polarized light, in the ...

Achromatic Waveplate Achromatic Waveplates(Retarders), AWP is composed of one piece of Crystal Quartz and one piece of Magnesium Fluoride, MgF2.

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Sclera: The white part of the eye that surrounds the iris. This structure is made up of fibrous tissue that protects the inner structures of the eye.

Rods and Cones: Photoreceptors located in the retina, responsible for processing light signals. Rods allow you to see shapes, while cones allow you to see colors.

L-bar Mini Prism mounted in metal holder. Supplied with L-bar for fixed installations. The prism offset is dependant on the mounting position,range 2000 m

Note for Spherical Lens: a. Other optical glass materials from Schott, Ohara, Hoya or Chinese CDGM, UVFS from Heraeus, Corning, Germanium, Silicon, ZnSe, ZnS, CaF2, Sapphire are also available upon request . b. Custom-made Spherical Lenses at any size from diameter 1.0 to 300mm are available upon request. One stop service  for Vision Optics-Laser Optics-Medical Optics-5G Optical Communication-Military Optics

True Zero Order Waveplates  1. Constructed of a true zero order waveplate and a BK7 substrate.As the waveplate is very thin and easy to be damaged,the Bk7 plate's function is to strengthen the waveplate.  2. Single Plate

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At this point, The light then passes from the lens to the back of the eye which is filled with a clear, gelatinous substance called the vitreous until it reaches the retina, the light-sensitive layer at the back of the eye.

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Titanium-doped Sapphire（Ti3+:Al2O3）crystals combine supreme physical and optical properties with broadest lasing range which is most widely used crystal for wavelength tunable lasers.

Material: Grade A optical glass or Fused Silica Dimension Tolerance: ±0.05mm to ±0.005mm Surface quality: 20/10 to 40/20 Clear Aperture: >85% Surface Figure: λ/4 to 2λ@633nm Centration: 3 arc minutes Note: Diameter: available from Φ1.0mm to Φ25mm  1.All surfaces (end-faces and cylinder)polished; 2.Only end-faces polished; 3.Only Cylinder polished.

The light is then focused throughout the retina which contains nerves called photoreceptors. The photoreceptors are made up of rods and cones, and are responsible for transforming the light rays into electrical impulses. While the light is focused throughout the retina, most of the light entering the eye is focused onto the focal point on the retina, known as the macula.

Optic nerve: A bundle of nerve fibers that contains more than one million nerve cells. Located in the back of the eye, this nerve is responsible for carrying visual information from the retina to the brain.

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The light continues to travel through the black opening in the center of the iris, called the pupil. The iris is the colorful part of your eye that gives it its blue, green, hazel, brown or dark appearance.

If any of these components do not function properly, or are irregularly shaped, vision problems can occur— most commonly, blurry vision will develop.

ZnSe is used widely for IR components, windows and lenses, and applied for Thermal Imaging, FLIR,  Medical systems and Co2 Laser

The iris is actually made up of muscles that expand and contract to control the pupil and adjust its size. So when you see your pupil getting bigger or smaller, it is really the iris that is controlling the pupil opening in response to the intensity of light entering the eye.

MgF2 windows are used in the UV, visible and IR ranges, with approximately 94% transmission from 200 - 1000 nm, and approximately 95% transmission from 1-6µm

Note for Spherical Lens: a. Other optical glass materials from Schott, Ohara, Hoya or Chinese CDGM, UVFS from Heraeus, Corning, Germanium, Silicon, ZnSe, ZnS, CaF2, Sapphire are also available upon request . b. Custom-made Spherical Lenses at any size from diameter 1.0 to 300mm are available upon request.

If the connections between the eye and brain are not well developed, the visual information that is sent to the brain will not be interpreted properly, and the image will be difficult to see.

When this happens, corrective lenses in the form of eyeglasses or contact lenses are prescribed to help the light focus accurately onto the retina and enable clear vision.

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At this point, the light has been bent twice— as it moved from the cornea through the lens, and then from the lens to the retina. This “double bending” has actually flipped the image upside down.

When we look at an object, the light that is reflected off of the object enters the eye through the clear front layer of the eye, called the cornea. The cornea bends the light before it passes through a watery substance that fills the area behind the cornea, called the aqueous humor.

If you suspect you have blurry vision or an eye condition, contact an eye doctor near you, who can diagnose and treat the condition.

If you notice any changes to your vision, make an appointment for an eye examination. Your eye doctor will assess your eye health and vision and provide various options to keep you seeing clearly.

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Retina: The light-sensitive membrane that lines the back of the eye; responsible for transforming light signals into electrical impulses to be sent through the optic nerve to the brain.

Cornea: The clear dome-like structure that covers the front of the eye and is responsible for bending light as it enters the eye.

The light then passes from the lens to the back of the eye which is filled with a clear, gelatinous substance called the vitreous until it reaches the retina, the light-sensitive layer at the back of the eye.

Made from BK7 material, which has transparent range from 330-2100nm. The refractive index is 1.5168 at 587.6nm. The BK7 window has good performance over visible and near IR spectrum for most application.

Iris: The colored part of the eye that is made up of muscles that control the pupil— contracting the pupil in bright light and expanding the pupil in low light.

The polarisation of a transverse wave describes a particular direction along which the oscillation occurs.

CaF2 has transparent range from 170-7800nm. The refractive index is 1.399 at 5000nm. 1. Low absorption coefficient 2. High damage threshold, 3. Low Dispersion (with an Abbe Number of 95) 4. Low fluorescence 5. Excellent water, chemical, and heat resistance